Search for dissertations about: "species pool"
Showing result 1 - 5 of 92 swedish dissertations containing the words species pool.
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1. Grassland restoration : Connectivity, plant community change and cows
Abstract : The ecological significance of semi-natural grasslands is high because these habitats provide a home for a diverse flora and fauna and support a range of associated ecosystem services. Due to large-scale land-use changes the extent of grassland habitat has declined. READ MORE
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2. Regional and local variation in plant species richness
Abstract : In this thesis, I examine the variation in plant species richness along gradients of productivity and disturbance in grasslands and forest habitats in southern Sweden, and I compare the documented patterns with theoretical predictions. Moreover, I evaluate the relative importance of habitat quality and habitat configuration for the occurrence of field layer species in deciduous forests. READ MORE
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3. Reproductive strategies and liming responses in forest field-layer flora
Abstract : Liming increased species richness, in accordance with the species pool hypothesis, and number of plants of individual species in beech forest field-layer vegetation, by increasing establishment by seedlings and vegetative offspring. Turnover rates also increased, suggesting the explanatory value of the carousel model. READ MORE
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4. Biological diversity values in semi-natural grasslands : indicators, landscape context and restoration
Abstract : Semi-natural grasslands, which are a declining and fragmented habitat in Europe, contain a high biodiversity, and are therefore of interest to conservation. This thesis examines how plant diversity is influenced by the landscape context, and how plant and fungal diversity can be targeted by practical conservation using indicator species and congruence between species groups. READ MORE
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5. Lifestyle and Genome Evolution in Vector-Borne Bacteria : A Comparison of Three Bartonella Species
Abstract : Bacterial genomes provide records of the molecular processes associated with emergence and evolution of different bacterial lifestyles. This thesis is based on whole-genome comparisons within the genus Bartonella, an excellent model system for studies of host- and vector-specificity and infection outcome in animal-associated bacteria. READ MORE